<template>
  <div class="hello">
    <h1>{{ msg }}</h1>
    <button @click="sum(1, 2)">按钮</button>
  </div>
</template>

<script lang="ts">
import { Component, Prop, Vue } from "vue-property-decorator";

@Component({
  // props: {
  //   msg: {
  //     type: String,
  //     default: "",
  //   },
  // },
  components: {},
})
export default class HelloWorld extends Vue {
  sum(a: number, b: number) {
    console.log(a + b);
  }
  created() {
    // console.log("created");
  }
  @Prop() private msg!: string;
}
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped lang="less">
h3 {
  margin: 40px 0 0;
}
ul {
  list-style-type: none;
  padding: 0;
}
li {
  display: inline-block;
  margin: 0 10px;
}
a {
  color: #42b983;
}
</style>
